Filmography
| 2022 | A Trip to Infinity · as Self |
| 2020 | Einstein and Hawking: Masters of Our Universe · as Self - Physicist |
| 2015 | The Late Show with Stephen Colbert · as Self |
| 2015 | StarTalk with Neil deGrasse Tyson · as Self |
| 2011 | Beyond the Cosmos · as Himself - Host |
| 2007 | The Big Bang Theory · as Brian Greene |
| 2005 | The Colbert Report · as Self |
| 2003 | Out of the Blue · as SelfEn Plex |
| 2000 | Frequency · as Himself |
| 2010 | Chuggington - Badge Quest · as Old Puffer Pete (us) |
| 2008 | Chuggington · as Old Puffer Pete (us) |
| 2007 | The Last Mimzy · as Intel Scientist |
| 2005 | Sometimes in April · as 'hutsi' Journalist |
| 2003 | The Elegant Universe · as Host |
| 2000 | Maze · as Plate Techtonics Man |
| 1999 | Maisy · as Narrator |
| 1992 | Spies Inc. · as Male Tv Announcer |
| 1991 | King Ralph · as Ed Mayes |
| 1990 | The Green Man · as Mr Klinger |
| 1990 | Perry Mason: The Case of the Desperate Deception · as Ambassador Todd |
| 1989 | Tailspin: Behind the Korean Airliner Tragedy · as Staff Member |
| 1986 | Hawk Jones · as Dancing Sailor |
| 1984 | Night Court · as Accordian Player |
| 1982 | Remington Steele · as Jonathan Hemmings |
| 1982 | Timewatch · as Secretary Of State James Byrnes |
| 1981 | Hill Street Blues · as John |
| 1979 | The Facts of Life · as Accordion Player |
| 1974 | NOVA · as Host |
| 1973 | The Young and the Restless · as Harry |